Fix code scanning alert - moby: Authz zero length regression

[2lambda123]

Tracking issue for:

• [ ] https://github.com/2lambda123/cisagov-Malcolm/security/code-scanning/162

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[gitginie[bot]]

@2lambda123! Thank you for your contribution to this repository! We appreciate your effort in opening issue. Happy coding!

[git-greetings[bot]]

Issues Details of @2lambda123 in cisagov-Malcolm :	OPEN	CLOSED	TOTAL
8	0	8

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